package utils;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

public class MyBatisUtil {
    private static SqlSessionFactory factory;

    static {
        try{
            InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
            factory = new SqlSessionFactoryBuilder().build(is);
        } catch (IOException e){
            throw new RuntimeException("初始化失败",e);
        }
    }
    //创建并返回SqlSession实例
    public  static SqlSession createSqlSession(){
        return factory.openSession(false);//关闭自动提交开启事务
    }
    //关闭SqlSession
    public static void closeSqlSession(SqlSession sqlSession){
        if (sqlSession != null)
            sqlSession.close();
    }

}
